TLE6389_07 Datasheet, PDF (16/38 Pages) Infineon Technologies AG – Step-Down DC/DC Controller

TLE 6389
4
Electrical Characteristics (cont’d)
5V < V_VS < 48V; -40°C < T_j < 150 °C;
All voltages with respect to ground; positive current defined flowing into the pin; unless otherwise specified
Item Parameter
Symbol Limit Values Unit Test Condition
min. typ. max.
4.35
4.36
4.37
Gate driver,
t_f
gate voltage, fall
time
Peak current limit
threshold voltage
Oscillator
frequency
V_LIM =
V_VS –
V_CS
f_OSC
50 65
ns
V_{ENABLE/SI_ENABLE}
=5V
C_BDS = 220 nF
C_GDRV = 4.7nF
50 70 90 mV
290 360 420 kHz PWM mode only
4.38 Maximum duty
d_MAX
100
cycle
% PWM mode only
4.39
4.40
4.41
4.42
Minimum on time t_MIN
220 400 ns PWM mode only
SYNC capture
range
∆f_sync
250
530 kHz PWM mode only
SYNC trigger level V_SYNC,h 4.0
high
V
2)
SYNC trigger level
low
0.8 V
2)
Reset Generator
4.43
4.44
4.45
4.46
Reset threshold
Reset headroom
Reset threshold
V_{VOUT, RT} 3.5
4.5
V_RT,HEAD 80
V_{VOUT, RT} 4.5
3.65 3.8
4.65 4.8
4.65 4.8
V TLE6389-3 GV50;
V_VOUT decreasing
V TLE6389-3 GV50;
V_VOUT increasing
mV TLE6389-2 GV50;
V_OUT(V_S=6V,
I_LOAD=1A)
-V_VOUT,RT
V TLE6389-2 GV50;
V_VOUT increasing/
decreasing
4.47 Reset threshold ∆V_VOUT,
50
hysteresis
RT
mV TLE6389-2 GV50
2)
Datasheet Rev. 2.1
16
2007-08-13